This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A244815 #7 Mar 14 2015 00:12:48
%S A244815 1,6,3,2,3,4,5,8,0,1,3,6,1,4,4,2,3,3,3,0,5,4,5,8,6,8,3,7,9,9,9,1,1,1,
%T A244815 1,1,7,1,9,1,7,1,1,1,1,1,7,1,9,2,7,2,1,2,1,2,7,2,9,2,7,3,1,3,1,3,7,3,
%U A244815 9,3,7,4,1,4,1,4,7,4,9,4,7,5,1,5,1,5,7,5,9,6,7,6,1,6,1,7,7,7,9,7,7,7,1,8,1
%N A244815 The hexagonal spiral of Champernowne, read along the 210-degree ray.
%F A244815 (3n^2 - 4n + 2)th almost natural number (A033307), Also see formula section of A056105.
%e A244815 see A244807 example section for its diagram.
%t A244815 almostNatural[n_, b_] := Block[{m = 0, d = n, i = 1, l, p}, While[m <= d, l = m; m = (b - 1) i*b^(i - 1) + l; i++]; i--; p = Mod[d - l, i]; q = Floor[(d - l)/i] + b^(i - 1); If[p != 0, IntegerDigits[q, b][[p]], Mod[q - 1, b]]]; f[n_] := 3n^2 - 4n + 2 (* see formula section of A244807 *); Array[ almostNatural[ f@#, 10] &, 105]
%Y A244815 Cf. A007376, A056109, A244807, A244808, A244809, A244810, A244811, A244812, A244813, A244814, A244816, A244817, A244818.
%K A244815 nonn,easy
%O A244815 1,2
%A A244815 _Robert G. Wilson v_, Jul 06 2014